Adds scanner recognition in some android devices

[sbricchi]

This change allows to detect codes in some Android device models that seems to report a different image format to the expected by this plugin.
You can find the solution and the problem explanation by https://github.com/gyaccuzzi at this issue:
#107

It's proven to add image recognition for these devices:

Motorola G82
Motorola G30
Motorola G5 (oldie)
Samsung A23

I can guess that it fixes many other models .
I'm not sure if changing the image scanning format could create any other kind of performance issues.

[Eskissimo]

Hi,

I suggest this additional code in order to get a good detection :

1- Add a constructor to handle orientation change :

    public CameraManager()
    {
        DeviceDisplay.MainDisplayInfoChanged += DeviceDisplay_MainDisplayInfoChanged;
    }

2- Update camera on orientation change :

    private void DeviceDisplay_MainDisplayInfoChanged(object sender, DisplayInfoChangedEventArgs e)
    {
        if (cameraPreview != null) UpdateCamera();
    }

3- Unregister event in Dispose :

    public void Dispose()
    {
        DeviceDisplay.MainDisplayInfoChanged -= DeviceDisplay_MainDisplayInfoChanged;

        cameraExecutor?.Shutdown();
        cameraExecutor?.Dispose();
    }

4- Configure camera preview with the same settings of the image analyzer :

            cameraPreview = new AndroidX.Camera.Core.Preview.Builder()
                .SetDefaultResolution(new Android.Util.Size(640, 480))
                .SetIsRgba8888SurfaceRequired(true)
                .Build();
            cameraPreview.SetSurfaceProvider(previewView.SurfaceProvider);

Regards.

[hassanraf]

@sbricchi @Eskissimo Any idea when these changes will be merged into master?
Thanks